According to PocketNow, the 7-inch HTC Flyer could be coming to the T-Mobile network in the United States.

The strong evidence comes from a supposed leak of several promotional ads that are clearly marketing the HTC Flyer and its stylus pen for the T-Mobile network. Perhaps coincidentally, the Flyer was also announced for Sprint’s network earlier this week at the CTIA 2011 show. This suggests that HTC may be launching its latest tablet for multiple networks in the U.S. Whether or not Sprint has a timed-exclusive deal for the Flyer, however, is currently unknown. If not, then the Flyer could potentially be available for T-Mobile subscribers not long after it releases for Sprint this summer.

Best Buy has also announced over the weekend that it will be selling a Wi-Fi only model of the Flyer this spring. All prices, however, are still unknown at this point.

Besides the change in hardware to support GSM, the internal specs of the possible T-Mobile HTC Flyer likely wouldn’t be diverging much from what we already know, so expect to still see a single-core 1.5GHzSnapdragon processor, 1GB RAM, front and rear facing cameras, and Android Gingerbread with HTC Sense interface.